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Finding the Fourth Proportional to 12,979.95, 17,912.07 and 7,314.71

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Solution

The fourth proportional to 12,979.95, 17,912.07 and 7,314.71 is: 10,094.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.95 : 17,912.07 = 7,314.71 : x
  2. Step 2: Convert to fraction form
    12,979.95/17,912.07 = 7,314.71/x
  3. Step 3: Cross multiply
    12,979.95x = 17,912.07 × 7,314.71
  4. Step 4: Simplify right side
    12,979.95x = 131,021,507.99
  5. Step 5: Solve for x
    x = 131,021,507.99/12,979.95
  6. Step 6: Final answer
    x = 10,094.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.